Editing 1820 (section)

=== April–June ===
*[[April 1]] – A proclamation, signed "By order of the Committee of Organisation for forming a Provisional Government", begins the "[[Radical War]]" in Scotland.
*[[April 8]] – The statue of the [[Venus de Milo]] (Aphrodite of Milos, {{Circa|150 BC}}-125 BC) is discovered on the Greek island of [[Milos]], by a peasant named Yorgos Kentrotas.<ref>{{cite book|title=School Arts|url=https://books.google.com/books?id=18oVAQAAIAAJ|year=1922|publisher=Davis Publications|page=444}}</ref>
*[[April 12]] – [[Alexander Ypsilantis]] becomes the leader of ''[[Filiki Eteria]]'', a secret organization to overthrow [[Ottoman Empire|Ottoman]] rule over Greece.
*[[April 15]] – King [[William I of Württemberg]] marries his cousin, [[Pauline Therese of Württemberg|Pauline Therese]], in Stuttgart.
* April – [[Hans Christian Ørsted]] discovers the relationship between [[electricity]] and [[magnetism]].
*[[May 1]] – The last judicial [[decapitation]] in the [[United Kingdom]] is meted out to the principals in the [[Cato Street Conspiracy|Cato Street conspirators]] after their public [[hanging]] for treason in London. Legally, the post-hanging beheading is a mitigation of the last sentence in Britain of "[[Hanged, drawn and quartered|hanging, drawing and quartering]]".<ref>{{cite book|last=Abbott|first=Geoffrey|title=Execution: a Guide to the Ultimate Penalty|publisher=Summersdale Publishers|location=Chichester|year=2005|orig-date=1994|isbn=978-1-84024-433-5|pages=161–2}}</ref>
*[[May 11]] – {{HMS|Beagle}}, the ship that will later take young [[Charles Darwin]] on his scientific voyage to examine the "origin of the species", is launched at [[Woolwich Dockyard]].
*[[May 20]] – At age 14, [[John Stuart Mill]] sets out on his formative trip to the south of France, staying with [[Samuel Bentham]].
*[[June 5]] – [[Caroline of Brunswick]], the estranged wife of King [[George IV of the United Kingdom]], returns to England after six years abroad in Italy, where she has been carrying on an affair. Since ascending the throne in January, the King had sought to receive his government's approval for a divorce.<ref>{{cite book|authorlink=Christopher Hibbert|first=Christopher|last=Hibbert|title=Wellington: A Personal History|publisher=Da Capo Press|year=1999|page=220}}</ref>
*[[June 12]] 
** [[Élie Decazes]], leader of the opposition in France's Chamber of Deputies, introduces the "Law of the Double Vote", a proposal to add to the existing legislators by creating 172 seats that would be "selected by special electoral colleges" made up of the wealthiest 25% of voters in each of France's departments.<ref>Munro Price, ''The Perilous Crown: France Between Revolutions, 1814-1848'' (Pan Macmillan, 2010) p108</ref>
** Delegates in [[St. Louis, Missouri|St. Louis]] in the [[Missouri Territory]] approve a proposed state constitution, proclaiming that they "do mutually agree to form and establish a free and independent republic, by the name of 'The State of Missouri'."<ref>"Missouri", in ''Constitutional Documents of the United States of America 1776-1860'', ed. by Horst Dippel (K. G. Saur, 2007) p221</ref>
*[[June 29]] –  The cause of action that will lead to the U.S. Supreme Court case known as ''[[The Antelope]]'' arises, when a U.S. Treasury [[Cutter (boat)|cutter]] captures a ship of the same name, which is transporting 281 Africans who had been captured as slaves, in violation of the U.S. law prohibiting the slave trade.<ref>"Antelope Case", by John T. Noonan, Jr., in ''Dictionary of Afro-American Slavery'',  (Greenwood, 1997) p66</ref>